Fuel nozzle



L. G. PARKER FUEL NOZZLE Feb. 13, 1945 Filed July 2 2, 1941 INVENTOR.LEIVIOUS G. PARKER. 27%

' HTTORNE x.

Patented Feb. 13, 1945 UNITED STATES PATENT 1 OFFICE FUEL NOZZLE LeniousG. Parker, Oakland, Calif. Application July 22, 1941, Serial No. 403,528

, 6 Claims. (01. 299-1074;)

created by'an auxiliary piston actuated in timed relation to the engine.

Another object of my invention is to provide a novel fuel nozzle of thecharacter stated, and in which the valve actuating piston also increasesthe pressure of the fuel prior to injection into the engine. I

Still another object is to provide a novel fuel nozzle of the characterstated which is effective in operation, and an arrangement of partspermitting an ease of assembly, and furthermore, a nozzle through whichfuel will readily flow, and which will properly meter,the fuel into theengme.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and theappended claims.

In the drawing:

Figure 1 is a diagrammatical nozzle.

Figure 2 is alongitudinal sectional view of the fuel nozzle.

Figure 3 is a longitudina1 sectional view of the fuel valve and theparts in which it is guided.

Figure 4 is a sectional view. taken on line 44 of Figure 2.

' Figure 5 is a sectional view taken on line 5--5 of Figure 3. a

Referring more particularly to the drawing, the fuel nozzle I consistsof a body 2 which is mounted in each of the engine cylinders in a usualand well known manner. This body is provided with a vertical bore 3 inwhich the valve is mounted, a second vertical bore 4, adjacent the bore3, and in which the actuating piston is mounted. A third horizontal bore5, connects the bores 3 and 4, and a jet is mounted in the bore 5, aswill be further view of my fuel described. A sleeve 6 is fixedly'mountedin the bore 3, and rests on a shoulder 1 in this bore, thuslimiting the downward movement of the sleeve. The sleeve is also pressedtightly in the bore, thus preventing longitudinal movement thereof. Afitting 8 is threaded into the upper end of the bore 3, and a cap 9,screws onto this fitting. An inlet port l extends into the upper end'ofthe cap 9, and this port is controlled by the spring pressed ball II. Afilter l2 of usual and well known design, is mounted on the fitting 8 bymeans of thenipple l3. A fuel valve I4 is mounted within the-bore 3, andis provided-with a piston I at its upper end which piston closely fitsthe ball of the sleeve 6. .The stem of the valve [4 may be madein twoparts if desired, that is, two

parts being held together and in alignment by means of the coupling l 6,whichis usual and well knownin the art. The lower end of the valve 14 isseated in the usualtip I], which is fixedly attached to the lower end ofthebody 2 by means ofa threaded coupling sleeve l8.

A fluid chamber I9 is provided under the piston l4 closely fits the.lower portion of the sleeve 6, and consequently, the chamber I9 issealed against leakage of fluid. A coil spring?!) bears against the topof the valve 14 urging the valve downwardly onto its seat in the tip l1.Fuel under pressure, enters through the port 10, into the cap 9. Thefuel then passes through the lilter l2, and thence into the springchamber 2| above the piston IS. The fuel then passes downwardly throughvertical slots 22 which are cut in the outer surface. of the sleeve 6.The lower portion of this sleeve is reduced in diameter, thus leaving anannular space 23 in the bore 3, through which, the fuel, under pressure,can pass. The

, fuel then moves downwardly around the stem of the valve I4, past thehead 24 of the guide sleeve 25, this head being provided with Verticalslots 25 to permit the passage of the oil. Ducts 21 are provided withinthe valve tip I! permitting the fuel, under pressure, to pass to theusual spray jets of the tip ll. The lower end of the valve i4 is seatedin the valve tip in the usual 'andwell known manner, and fuel can passinto the engine piston l5 to a point below the piston 28 when this lastnamed piston is in, raised position. The chamber 30 opens into the bore5, and a jet 32 is fixedly mounted in the bore 5 and opens into thechamber, I9. A follower cap 3;" bears against the top of the plunger 28and isengaged by the rocker arm 34, this rock-er arm being actuated fromthe cam 35, in the usual and well known manner. The cam 35 is enginedriven, and consequently,

the plunger 28 will be reciprocated in timed rela-.

tion to the engine. A coil spring 36 bears against the plunger 28, andreturns this plunger to its normal raised position.

- As previously described, fuel, under pressure, enters the port I 0,flowing downwardly, as-previously described, to the tip N. This fuel,under pressure, also passes through the duct 3|, filling the chamber 30,the bore 5, and the chamber I9. When the cam 35 depresse the plunger 28,the fuel in the chambers 30, I9, and bore 5, is placed under pressure.As the plunger 28 moves downwardly, the fuel, under high pressure, isforcedfbackwardly through "the duct 31, until this duct is closedlbyythe movement of the plunger. The fuel oil which the nozzle thus hasits pressure increased a certain amount, and the ball check ll preventsthe movement of this high pressure fuel back into the intake dine. A theplunger 28 continues its downward movement, the fuel oil, underpressure, willbe exerted against the bottom of the piston 5,thusrais'ing pressure, to spray out of the nozzle 11. the plunger- 2Bretums'to-its raised position under the urge of the spring 36, spring 20will tip, spring means yieldably holding the valve [from the remainingportionof the bore, .a second bore in the body, an actuating plungerreciprocally mounted in the second bore, means to actuate saidplunger,-'fuel intake mean communicating'with the first named borewhereby, fuel ,underpressure is ied-into ,the first named ibore above{the piston, said Irb'ore having bypassed grooves in the peripherythereof to by-pass the piston head and said chamber and through whichfuel is adapted to pas to the tip, said body having :an intake ductextending from above the piston headin said first bore to said secondbore the valve I4, thus permitting fuel oil, under high Whensimultaneously =sea'tf-the valve 1 1. Thismycle .is

repeated in timed =relation to themiovement of thepiston in the enginecylinders.

Having described my "invention, I claim:

1. -A fuel nozzle comprising :a body, having {a bore-providing a fuelpassage with a'valve seat and a bore for a plunger, -a valve in 'saidpassage and arranged to engage sa'id seait, said bo'dyhav- 'i-ng a fluidchamber arranged to be sealed from said "passage, a piston head on saidvalve in communication with said chamber and arranged to move said valvef-to uncover sai'd seat when pressure is increased in said chamber,means its providing :a -duct from said second bore to said chamber,means providing a-commuriication du'ct between said "passage and saidsecond 'bore, and

,a, plunger in said second bore,' sa,id ducts beingarranged sothat--uponadvance of said plunger the pressure .said communication duct "will beincreased :and upon eontinued advance the plunger will ,seal said fluid."chamber from said passage by closing said-communication *duct andthereafter increase the pressure of the fluid in k 0 said chamber.

,2. A fuel nozzle comprising ;a body having afuel passagewith .a seat atan end of said passage, a cylinder 'for a plunger, a high pressure,fuelinlet to said passage, 'a "check valve to close the inletagainstback flow of fuel from the passage, a valve in'jsaid passagebetween-said inlet and seat ,and arranged to normally engage said seat,a piston head on "said valve, a fluid cham}.

Joerinsaidbody'arrangedto'besealedfrom said I seat said valve, ,a ductextending tirom said pasand positioned to be closed by the plunger as it:moves to an advanced position by said actuating meanssaid body havinga, second duct connecting the chamber under the piston with the secondbone :at a :point further .from the plunger than the point ofconnection; ofxsaid ifirstmiuct-fiscconnerns saidzmovementv:ofiftheyplunger.

a 4. A fiuel nozziescomprising .a-.bo.dy,.isaid-body having :a boretherein, .a piston having a piston :head in the :bore, :a valverdependingafrom the piston and extending longitudinally in said bore,

,.-a muzzle tip :at'ithe lower end of the bore, said valve :be'ingseateddnthetip, spring means, yieldably holding the valve seated :a ainst the:tip, rsaidj bore having a chamber therein :below and communicating,withthe piston head and -2ar- :ranged so that ,it is sealed from-theremaining portion of the bore, a :second .bore in the body,

anzactuating plungerzreciprocally mounted :in :the

Lsecond bore and positioned :to be closed :by .the

plunger as it moves to an advanced position "by said actuating ,means,:said body having a second duct connecting the chamber under the p stonwith the second boreat a point further from thefplunger-than the pointofconnection of said rfirst duct :as concerns said zmoyement of theplunger. I

,5. A :fuel nozzle ecomprisinga body, said body having a bore therein,apiston having a piston sage to said cylinder at a point such that dur-viing the end portion of .the forward stroke lthe beginnin portion of"the return "stroke of 'lthejplunjger the latter duct will "be 'olosedwhile ltheother duct will remain open, end a means-to reciprocate saidplunger.

A fuel .nozzle comprising iabody, said body having a vertical boretherein, a having ,a piston "head operating in :tlre'bore, a "valvedepending from the -piston and extending longitudinally insaid bore, anozzle tip at the lower end of the bore, said valve being seated in thehead operating in the bore, a valve connected to one end of the pistonand extending longitudianallylinesaid bore, Bti-IIOZZIE tip at one endof said here, ,said valve ibeing seated .in .the :tip, spring :means,yieldabl-y holding the valve seat against 'the tip, said bore :having:a chambertherein located between the end of-;-the'piston andithe iseatend of the :bore, and tcommunicatingwith the piston dread :and:arrangedsoqthat it .is sealed :irom :the remaining portion of the130113;? second 'bore in, the body, an actuatin plunger Fri-391E120-cally mounted lthfl senond more, means to antnate said mil-Inger, duel:intake mean-s com' municating with 'the :ilrstmamed :bore wherebysin-e1 under "pressure is ii-ritozthe first named of the piston head insaid first bore to said second bore and positioned to be closed by theplunger as it moves to an advanced position by said actuating means,said body having a second duct connecting=the first named chamber withthe second bore at a point further from the plunger than the point ofconnection of said first duct as concerns said movement of the plunger.7

6. A fuel nozzle comprising a body, said body having a bore therein, apiston having a piston head operating in the bore, a valve connected toone end of the piston and extending longitudinally in said bore, anozzle tip at one end of said bore, said valve being seated in the tip,spring means yieldably holding the valve seat against the tip, said borehaving a chamber therein located between the end of the piston and theseat end of the bore, and communicating with the piston head andarranged so that it is sealed from the remaining portion of the bore, asecond bore in the body, an actuating plunger reciprocally mounted inthe second bore, means to actuate said plunger, fuel intake meanscommunicating with the first named bore whereby fuel under pressure isfed into the first named bore to the opposite side of the piston fromsaid chamber, said bore having bypassed grooves in the periphery thereofto by-pass the piston head and said chamber and through which fuel isadapted to pass to the tip, said body having an intake duct extendingfrom the said opposite side of the piston head in said first bore tosaid second bore and ositioned to be closed by the plunger as it move toan advanced position by said actuating means, said body having a secondduct connecting the first named chamber with the second bore at a pointfurther from the plunger than the point of connection of said first ductas concerns said movement of the plunger, said fuel intake meansincluding a check valve. LEN'IOUS G. PARKER.

